Some of the more popular Buick cars include the LeSabre, Enclave, and Regal – the latter of which was also the official pace car for the 1981 Indianapolis 500. A special 90th Anniversary Edition LeSabre was also launched in 1993 to celebrate Buick’s 90th anniversary.. A/G BODY WIRING DIAGRAMS Right click and "save as" to save images or click on the Click Here button to view images. Dial-up users, be aware that these images are between 200-700KB in size!. Buick Regal Parts at GMPartsGiant. Find the right Genuine OEM Regal Parts from the full catalog we offer. Buick Regal Engine Wiring Harness Connector. Popular Windshield, Wiper, Mirrors, Instrument Panel, (1978-1987), it won a majority of the 1981 and 1982 NASCAR racing season and won the NASCAR manufacturers title in these two years.